摘要:
Memorization method in an electronic controller operating with fuzzy logic procedures for membership functions (FA) of logical variables (M) defined in a so-called discourse universe (U) discretized at a finite number of points (m) which provide memorization of triangular or trapezoid membership functions (FA) by means of memory words comprising a first portion in which is contained a codification of the vertex of the membership function (FA) and a second portion containing a codification corresponding to the slope of at least one side of the membership function (FA) as well as a third portion containing a codification corresponding to the slope of at least one other side of the function.
摘要:
The present level shift circuit has a first (I1) and a second (I2) input respectively for input of a first and a second voltage signal and an output (OT) and comprises:
a) a first transistor (Q1) having a control terminal (G1), a first (S1) and a second (D1) main conduction terminal identifying a main conduction path, and b) a second transistor (Q2) of the same type as said first transistor (Q1) and having a control terminal (G2), a first (S2) and a second (D2) main conduction terminal identifying a main conduction path. The first signal is applied essentially between said control terminal (G1) and said first terminal (S1) of said first transistor (Q1) and said second input (I2) is coupled with the control terminal (G2) of said second transistor (Q2). The currents flowing in the conduction paths of the first (Q1) and the second (Q2) transistors are mutually proportional and one made from the other. The output (OT) is coupled with the first terminal (S2) of the second transistor (Q2). The control terminal (G1) of said first transistor (Q1) is connected to a potential reference (GND). The first signal is applied essentially to said first terminal (S1) of said first transistor (Q1).
摘要:
Circuit for calculation of values of membership functions (FA) in a controller (1) operating with fuzzy logic procedures and said membership functions (FA) being of triangular or trapezoid form and defined in a so-called discourse universe (U) discretized in a finite number of points (m) and said controller (1) comprising a central control unit (3) equipped with a memory section (5) for memorization of said membership functions (FA) and connected to a microprocessor (9) in turn connected to an interface (13) and in which the membership functions (FA) are memorized by means of a codification (FA i ) of the coordinate of the vertex and the slopes at the sides of the vertex. The circuit comprises a calculator (11) connected to the memory section (5), to the microprocessor (9), and to the interface (13), to reconstruct the value (α) of each membership functions (FA) at each point of the discourse universe (U).
摘要:
Method of parallel processing of multiple inference rules (R) organized in fuzzy sets or logical functions of multiple fuzzy sets comprising membership functions (I') defined in a so-called universe of discourse (U) and said inference rules (R) being configured essentially as IF-THEN rules with at least one antecedent preposition and at least one consequent implication and each preposition comprising at least one term (T) of comparison between membership functions (I') and a plurality of input data (I) and each term (T) being separated by logical operators (OL). The method comprises at least one phase of calculation of the weight (Ω) of each term (T) of the antecedent part of each fuzzy logic inference rule as the greatest value of the intersection between the set of input data (I) and the corresponding membership functions (I').
摘要:
Method of parallel processing of multiple inference rules (R) organised in fuzzy sets or logical functions of multiple fuzzy sets comprising membership functions (I') defined in a so-called universe of discourse (U) and said inference rules (R) being configured essentially as IF-THEN rules with at least one antecedent preposition and at least one consequent implication and each preposition comprising at least one term (T) of comparison between membership functions (I') and a plurality of input data (I) and each term (T) being separated by logical operators (OL). The method associates with the logical operators (OL) maximum and minimum operations among two or more elements and calculates exhaustively the overall degree of truth (Ω) of a rule (R) with a maximum or minimum of N partial truth levels (w).